Alert archive / North Carolina / Areal Flood Warnings in 2012

Areal Flood Warning 1, NWS Raleigh, NC

May 14, 2012Forsyth County, North Carolina

NWS Raleigh, NC issued this areal flood warning at May 14, 2012, 8:00 PM EDT for Forsyth County, North Carolina. It was in force for 14 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 14, 2012, 8:00 PM EDT (00:00 UTC)
Expired: May 15, 2012, 10:11 AM EDT
In force: 14 hr
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Flood severity: None

County Forsyth County, NC

The radar

The Roanoke radar (KFCX), 99 km from the middle of the area, began a volume at 00:00 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 0.0 hours before the alert went out and 32 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 713 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 545 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Raleigh, NC wrote its last area forecast discussion before this areal flood warning went out at May 14, 3:33 PM EDT, 4 hours 27 minutes earlier.

Area forecast discussion, May 14, 3:33 PM EDT, 4 hours 27 minutes before

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Hazardous weather outlook, May 14, 4:16 PM EDT, 3 hours 44 minutes before

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In the hours before

Special weather statement, May 14, 2:38 PM EDT, 5 hours 22 minutes before

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Local storm report, May 14, 2:57 PM EDT, 5 hours 3 minutes before

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Local storm report, May 14, 3:07 PM EDT, 4 hours 53 minutes before

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Special weather statement, May 14, 3:28 PM EDT, 4 hours 32 minutes before

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Special weather statement, May 14, 4:23 PM EDT, 3 hours 37 minutes before

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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, May 14, 5:04 PM EDT, 2 hours 56 minutes before

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      <p id="message2">
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 14, 8:45 PM EDT	Flash Flood Warning	RAH	Davidson, Forsyth	3 hr
May 14, 8:59 PM EDT	Severe Thunderstorm Warning	RAH	Davidson, Forsyth, Guilford, Randolph	76 min
May 14, 10:48 PM EDT	Special Weather Statement	RAH	Anson, Montgomery, Moore, Stanly	57 min
May 14, 11:41 PM EDT	Areal Flood Advisory	RAH	Chatham, Randolph	72 min
May 15, 2:35 AM EDT	River Flood Warning	RAH	Davidson, Davie	30 hr
May 15, 2:44 PM EDT	Special Weather Statement	RAH	Wayne	46 min
May 15, 2:57 PM EDT	Flash Flood Watch	RAH	Davidson, Forsyth, Guilford	7 hr
May 15, 2:59 PM EDT	Special Weather Statement	RAH	Wayne	61 min
May 15, 3:45 PM EDT	Special Weather Statement	RAH	Wayne	60 min
May 15, 4:08 PM EDT	Special Weather Statement	RAH	Sampson	67 min
May 15, 4:44 PM EDT	Severe Thunderstorm Warning	RAH	Johnston, Wayne	46 min
May 15, 5:25 PM EDT	Special Weather Statement	RAH	Johnston, Wayne	65 min
May 15, 5:38 PM EDT	Severe Thunderstorm Warning	RAH	Nash, Wilson	52 min
May 15, 6:29 PM EDT	Special Weather Statement	RAH	Edgecombe	46 min
May 15, 6:35 PM EDT	Special Weather Statement	RAH	Johnston	40 min
May 15, 7:25 PM EDT	Special Weather Statement	RAH	Franklin	65 min
May 15, 7:42 PM EDT	Severe Thunderstorm Warning	RAH	Franklin	48 min

Nearby

Areal Flood Warnings in North Carolina, 2012 Every areal flood warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.